Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
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Effect of B4C Addition on the Microstructures and Mechanical Properties of ZrB2-SiC Ceramics

ZrB2-SiC 세라믹스의 미세구조와 기계적 물성에 미치는 B4C 첨가효과

  • Chae, Jung-Min (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Lee, Sung-Min (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Oh, Yoon-Suk (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Hyung-Tae (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Kim, Kyung-Ja (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology) ;
  • Nahm, Sahn (Department of Advanced Materials Engineering, Korea University) ;
  • Kim, Seong-Won (Engineering Ceramic Center, Korea Institute of Ceramic Engineering and Technology)
  • 채정민 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 이성민 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 오윤석 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김형태 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 김경자 (한국세라믹기술원 엔지니어링세라믹센터) ;
  • 남산 (고려대학교 신소재공학과) ;
  • 김성원 (한국세라믹기술원 엔지니어링세라믹센터)
  • Received : 2010.10.11
  • Accepted : 2010.10.25
  • Published : 2010.11.30
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Abstract

$ZrB_2$ has a melting point of $3245^{\circ}C$ and a relatively low density of $6.1\;g/cm^3$, which makes this a candidate for application to ultrahigh temperature environments over $2000^{\circ}C$. Beside these properties, $ZrB_2$ is known to have excellent resistance to thermal shock and oxidation compared with other non-oxide engineering ceramics. In order to enhance such oxidation resistance, SiC was frequently added to $ZrB_2$-based systems. Due to nonsinterability of $ZrB_2$-based ceramics, research on the sintering aids such as $B_4C$ or $MoSi_2$ becomes popular recently. In this study, densification and high-temperature properties of $ZrB_2$-SiC ceramics especially with $B_4C$ are investigated. $ZrB_2$-20 vol% SiC system was selected as a basic composition and $B_4C$ or C was added to this system in some extents. Mixed powders were sintered using hot pressing (HP). With sintered bodies, densification behavior and high-temperature (up to $1400^{\circ}C$) properties such as flexural strength, hardness, and so on were examined.

Keywords

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  2. -SiC Ceramics Fabricated by Hot Pressing with Change in Ratio of Submicron to Nano Size of SiC vol.50, pp.6, 2013, https://doi.org/10.4191/kcers.2013.50.6.410
  3. Transmission Electron Microscopy Investigation of Hot-pressed ZrB2-SiC with B4C Additive vol.52, pp.6, 2015, https://doi.org/10.4191/kcers.2015.52.6.462